这句英语的结构是什么？

Question

As is vividly depicted in the left part of the drawing, thirty years ago, there stood a delicate mother, holding the tiny hand of a lovely girl.
前面的As is ....是省略了what吗？就像As what is...
还是什么结构

Answer 1

回答如下：
根据句子结构，本句是主从复合句，即定语从句+ 主句。下面详述如下：
非限制性定语从句As is vividly depicted in the left part of the drawing (As是关系代词，指代整个主句，在定语从句中作主语，vividly是方式状语，is depicted是复合谓语，in the left part of the drawing是地点状语) + 主句(倒装句型) thirty years ago, there stood a delicate mother, holding the tiny hand of a lovely girl ( thirty years ago 是 时间状语，there是引导词，stood 是主句谓语，delicate是定语，mother是主句的主语，holding the tiny hand of a lovely girl是现在分词短语作伴随或方式状语。 )
关系代词as可以引导限制性定语从句，也可以引导非限制性定语从句，可以在定语从句中作主语、宾语、表语。它引导非限制性定语从句时，它的先行词还可以是整个句子。as引导的非限制性定语从句有三个位置：句首、句中和句尾，并且都要用逗号跟主句隔开。例如：
Such books as were mentioned yesterday have been sold out. (as作主语)
This is the same knife as I lost yesterday. (as作宾语)
He is not the same person as he was.(as作表语)
I smoke as expensive a cigar as I can afford. (as作宾语)
As is well known, China is famous for the Great Wall = China, as is well known, is famous for the Great Wall = China is famous for the Great Wall, as is well known. (as作主语，其先行词是整个主句)
He is very careful, as his works show. (as作宾语)

Answer 2

perhaps encouragingly,more than half of the pupils(59%)identified that it is human activities 【which】are destroying rainforests,some personalising the responsibility by the use of terms such as 'we are超过59%的学生认为是人类行为导致了雨林的破坏，甚至有些同学用‘我们’来表达自己的责任。

首先该句子有错，which应为that。
分析：
主结构：
half 。。。identitfied that从句（主谓宾从结构）
宾从的结构：
it is 。。。【that】。。。是强调句型。不强调就是human activitiesare destroying rainforests.

注意： some personalising the responsibility by the use of terms such as 'we are “是 独立主格结构，some指的是有的人，本结构直面理解为，有的人通过用我们怎怎样，把责任个人化。也就是承担责任。
独立主格结构就不用讲了吧？perhaps encouragingly 副词修饰整句话，作状语。
第一个逗号后面是一个主谓宾，宾语是一个从句。宾语从句是一个强调句“it is ...that...”（which是错的，应该是that）。
第二个逗号后面是一个独立主格结构。是with复合结构的演变（with some personalising the responsibility by...）

Answer 3

1.as引导的是定语从句 做从句中的主语
2.as is …结构翻译成“正如…”